close friend, bosom buddy / crony, chum

木口: lumber grade or quality; cut end; wooden grip

木口: a surname

lumber grade, the quality of a piece of wood / cut end (of a piece of wood) / wood handle, wooden grip

(chiefly women's speech) first person singular pronoun: I, me

入り口, 入口: entrance

casual talk, usage of an informal speech style

出口: exit

野口, 埜口: a surname

降り口: an exit involving descent